around

A box covering points, or null when there are none.

Null rather than a box at (0, 0): treating "no data yet" as a real location is how the OSMdroid map used to open in the Atlantic.

A single point, or several stacked on one spot, yields a zero-area box the camera cannot fit to — a stationary node's whole position track is exactly that — so a degenerate box is padded to something framable.

Longitudes are min/maxed linearly, so a mesh straddling the antimeridian fits the long way round. Deliberate, matching the KML converter's polygon stance: wrapped bounds would have to flow through two renderers' camera-fit APIs to pay off, and no mesh this app has met sits on the date line.